Dishwasher rack and compact type dishwasher having the same

ABSTRACT

Disclosed is the compact type dishwasher, including: a washing space for accommodating dishes therein, a lower rack disposed inside the washing space, an upper rack disposed above the lower rack, and having a dish collision preventer for preventing a collision with the dishes placed at the lower rack, and a sub-rack mounted at the dish collision preventer so as to utilize a space formed above the dish collision preventer, wherein the sub-rack includes a plurality of first support members and a plurality of second support members crossing the first support members, and at least one concavo-convex portion is formed at the first support members, thereby enhancing utilization of the space above the dish collision preventer of the upper rack as well as meeting a customer&#39;s need for minimizing the size of the dishwasher.

RELATED APPLICATION

The present disclosure relates to subject matter contained in priorityKorean Application No. 10-2007-0080908, filed on Aug. 10, 2008, which isherein expressly incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a dishwasher rack, and moreparticularly, to a compact type dishwasher having a sub-rack, which ismounted at an upper rack of the compact type dishwasher so as tomaximize space utilization of the upper rack.

2. Background of the Invention

In general, a dishwasher is an electronic home appliance for washingdishes by a pressure of washing water injected from upper and lowernozzles mounted in a washing space.

FIG. 1 is a perspective view showing a conventional compact typedishwasher. Referring to FIG. 1, the conventional dishwasher 10 mayinclude a washing space 16 formed in a body having an opened frontsurface, and having a hexahedron shaped-cavity therein; a door 20openably mounted at the front surface of the washing space 16; a dishrack 12 slidably inserted into the washing space 16; and a nozzle 14 brotatably disposed below the dish rack 12, and injecting washing waterthrough an injection hole.

Here, the dish rack 12 is provided with a receiving wheel forconveniently pushing in and/or pulling out the dish rack 12, and iscomprised of an upper rack 12 a and a lower rack 12 b.

The recent trends in the dishwashers show a preference for small-sizeddishwashers, and such trends are expected to continuously increase.

As the size of the dishwasher 10 becomes smaller, the size of dishes tobe accommodated in the dish rack 12 would be limited. In general, theupper rack 12 a is configured to accommodate the dishes of a relativelysmall size, and the lower rack 12 b is configured to accommodate thedishes of a large size. In order to accommodate larger sized-dishes inthe lower rack 12 b, a dish collision preventer 15 is formed at aportion of the upper rack 12 a. That is, in order to prevent the dishesreceived in the lower rack 12 b from colliding with the upper rack 12 a,the dish collision preventer 15 formed to have a shallower depth thanother portion is formed at the upper rack 12 a.

However, the small-sized dishes could not properly use a space above thedish collision preventer 15 of the upper rack 12 a. That is, the spacebetween an upper portion of the dish collision preventer 15 and thewashing space 16 has a very low height, thereby being unable to receivea plate, a cup, and the like. If a spoon or a knife is to beaccommodated, it would be fallen down through gaps of the upper rack 12a when pushing in or pulling out the upper rack 12 a.

In addition, the receiving wheel of the lower rack 12 b is frequentlycaught between the door 20 and the washing space 16, thereby causing aninconvenience to push in and/or pull out the lower rack 12 b.

SUMMARY OF THE INVENTION

Therefore, an object of the present invention is to provide a dishwasherrack which can enhance space utilization of the dishwasher by mounting aseparate sub-rack at a dish collision preventer formed at an upper rackused in a compact type dishwasher, and a compact type dishwasher havingthe same.

Another object of the present invention is to provide a dishwasher rackhaving a sub-rack, which can prevent cooking utensils from being fallendown or moved (dislodged) when pushing in and/or pulling out a dish rackeven though the cooking utensils have a long shape such as a spoon, afork, a knife, and the like.

Another object of the present invention is to provide a dishwasher rackby mounting a ski-shaped supporting plate, instead of a receiving wheel,so as to prevent the supporting plate from being caught (stuck) by adoor when pushing in and/or pulling out a dish rack, and a compact typedishwasher having the same.

To achieve these and other advantages and in accordance with the purposeof the present invention, as embodied and broadly described herein,there is provided a dishwasher rack, including: a lower rack, an upperrack having a dish collision preventer so as to prevent a collision withdishes placed at the lower rack, and a sub-rack mounted at the dishcollision preventer so as to utilize a space formed above the dishcollision preventer.

With such construction, receiving spaces in the upper rack may fully beutilized even though the size of the dishwasher is small in size.

Here, the sub-rack includes a plurality of first support members and aplurality of second support members crossing the first support members,and at least one concavo-convex portion is formed at the first supportmembers. That is, collisions or mixing with the dishes placed on thesub-rack can be minimized by having a mesh type surface for placingdishes thereon formed by crossing the first support members and thesecond support members, and by forming the at least one concavo-convexportion at the first support members. In addition, when pushing inand/or pulling out the upper rack, a noise caused by collisions of thedishes placed on the sub-rack may be reduced.

Further, it is preferable that the first support members are formed in awidth direction of the sub-rack, and the second support members areformed in a lengthwise direction of the sub-rack. This is because thesub-rack is to accommodate long-shaped tableware (e.g., a spoon, a fork,a knife, etc.), thereby placing the long-shaped tableware in theconcaved portions of the concavo-convex portion formed at the firstsupport members.

Meanwhile, a main frame is formed at an outer periphery of the first andsecond support members. The main frame is configured to support anoverall shape of the sub-rack, and includes a mounting portion formounting the dish collision preventer.

Here, the sub-rack further includes a third support member formedbetween the first support members, and a plurality of ribs are formed atthe third support member. Here, the ribs formed at the third supportmember may be formed to have a height greater than the protrudingportion of the concavo-convex portion of the first support members,thereby being able to receive a knife, and the like.

In addition, a locking portion for mounting the sub-rack at a verticalsupport bar forming the dish collision preventer is formed at thesub-rack, and a locking portion is formed in a lengthwise direction ofthe main frame. That is, the sub-rack is mounted at the support bar ofthe dish collision preventer, and for this, the locking portion isformed at the main frame. With this configuration, if a locking portionamong the locking portions is locked by the support bar of the dishcollision preventer, the sub-rack may be mounted, thereby convenientlymounting the sub-rack.

Here, a locking groove is formed at the locking portion, and the lockinggroove is opened toward a lower portion of the locking portion.Accordingly, the sub-rack can be conveniently mounted after placing andsimply pressing the sub-rack on the dish collision preventer.

Meanwhile, a plurality of first concaved portions are formed at theshort sides of the main frame which are perpendicular to the secondsupport members, and the first concaved portions are opened toward alower portion of the sub-rack. Even though tableware disposed in thesub-rack has a length longer than the main frame, one end of thetableware may be exposed to the outside of the main frame through thefirst concaved portion, thereby receiving the tableware without anydifficulty.

In addition, the first concaved portion 156 is positioned at the samestraight line as a space among the valley portions of the first supportmember. If tableware disposed in the sub-rack has a length longer thanthe main frame, and accordingly, one end of the tableware is exposed tothe outside of the main frame through the first concaved portion, thetableware may be prevented from being separated from the sub-rack by theconcaved portions of the concavo-convex portion of the first supportmember and the first concaved portion.

Here, the main frame includes a second concaved portion at positions inwhich both ends of each third support member are coupled to the mainframe. The second concaved portions formed at a lower portion of thethird support members serve to support the sub-rack, and the secondconcaved portions may be formed at an entire lower portion of the thirdsupport members.

Here, a width of the third support member is greater than that of thefirst support member. Accordingly, a groove for mounting the support barof the dish collision preventer may be formed at a lower portion of thethird support member.

To achieve these and other advantages and in accordance with the purposeof the present invention, as embodied and broadly described herein,there is provided a compact type dishwasher, including: a washing spacefor accommodating dishes therein, a lower rack disposed inside thewashing space, an upper rack disposed above the lower rack, and having adish collision preventer for preventing a collision with the dishesplaced at the lower rack, and a sub-rack mounted at the dish collisionpreventer so as to utilize a space formed above the dish collisionpreventer, wherein the sub-rack includes a plurality of first supportmembers and a plurality of second support members crossing the firstsupport members, and at least one concavo-convex portion is formed atthe first support members.

Here, a ski-shaped supporting plate is formed below the lower rack suchthat the supporting plate can be prevented from being stopped by a doorfor opening/closing the washing space when pushing in or pulling out thelower rack.

Here, the ski-shaped supporting plate may be formed at the lower rack.

The foregoing and other objects, features, aspects and advantages of thepresent invention will become more apparent from the following detaileddescription of the present invention when taken in conjunction with theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate embodiments of the invention andtogether with the description serve to explain the principles of theinvention.

In the drawings:

FIG. 1 is a perspective view showing a conventional dishwasher;

FIG. 2 is a perspective view showing an upper rack according to oneembodiment of the present invention;

FIG. 3 is a perspective view showing a sub-rack mounted at a dishcollision preventer in FIG. 2;

FIG. 4 is a plane view showing the sub-rack in FIG. 3;

FIG. 5 is a side view showing the sub-rack in FIG. 3; and

FIG. 6 is a front view showing the sub-rack in FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

Description will now be given in detail of the preferred embodiments ofthe present invention, examples of which are illustrated in theaccompanying drawings. The following description represents many aspectsthat can be claimed, and constitutes a part of detailed descriptionabout the present invention.

Detailed explanation about well-known functions or configurations willbe omitted so as to implement the present invention more explicitly.

Wherever possible, the same reference numerals will be used throughoutthe drawings to refer to the same or similar parts.

The construction of the compact type dishwasher according to the presentinvention is almost the same as or similar to the compact typedishwasher shown in FIG. 1, however, the construction having an upperrack and a sub-rack is different from each other, therefore detaileddescriptions thereof will be given. That is, the compact type dishwasheraccording to one embodiment of the present invention includes the upperand lower racks, and the like.

In addition, an external appearance of the compact type dishwasheraccording to the present invention is not limited to the shape of thedishwasher shown in FIG. 1, but may include a variety of externalappearances.

FIG. 2 is a perspective view showing an upper rack according to oneembodiment of the present invention. Referring to FIG. 2, the upper rack100 used for the compact type dishwasher according to one embodiment ofthe present invention is formed to have an approximately mesh-typebasket.

The upper rack 100 is formed of wires having a certain thickness to forman overall shape thereof as well as a strength (intensity) enough tosupport a plurality of the dishes placed thereon. Such wires enablewashing water to be smoothly injected even to the dishes disposed at aninnermost part of a washing space.

Here, the upper rack 100 is formed to have an opened upper portionthereof so as to conveniently accommodate the dishes therein, andincludes two side surfaces in right and left directions and front andrear surfaces extending from the two side surfaces.

The both side surfaces are formed by a plurality of horizontal supportbars 120, and the front and rear surfaces are formed by a plurality ofvertical support bars 110. Meanwhile, the two side surfaces and thefront and rear surfaces are connected by a plurality of peripherysupport bars 130 in up and down directions.

Here, the vertical support bars 110, the horizontal support bars 120 andthe periphery support bars 130 support one another by welding, and thelike. A handle 101 allowing a user to hold the upper rack 100 by hishand is formed at the front surface of the upper rack 100.

Meanwhile, a plurality of supporting plates 102 are disposed at a lowersurface of the upper rack 100 so as to be received toward inside thewashing space 16 while making a slide-contact with guide rails (notshown) each disposed inside the above-described washing space (16 inFIG. 1) and at an inner surface of the door.

Here, the ski-shaped supporting plate 102 is formed to have anapproximate plane shape for an enough area of a contact surface, andboth ends thereof are formed inclined or rounded.

The supporting plates 102 may be formed at each side of the upper rack100, and in this case, the supporting plates 102 should have a lengthenough to support the upper rack 100.

A straight line-shaped protrusion (not shown) may be formed at the guiderail in order to stably support the supporting plates 102, therebypreventing the supporting plates 102 from straying (being separated)from the guide rail when pushing in and/or pulling out the upper rack100.

These supporting plates 102 may be disposed at the upper rack 100 aswell as the lower rack (12 b in FIG. 1).

In addition, the upper rack 100 according to the present invention mayinclude a dish collision preventer 140 allowing large plates tovertically place at the lower rack 12 b. That is, even though largeplates having the same height as the dish collision preventer 140 areplaced at the lower rack 12 b, a damage occurring when the large platescollide with the upper rack 100 can be prevented.

Here, since the dishwasher is the compact type dishwasher, a spaceformed between the upper portion the dish collision preventer 140 andthe ceiling of the washing space 16 is very small with a limited height.

Description of the sub-rack mounted above the dish collision preventer140 which is considered as a space unused will be given in detail withreference to FIGS. 3 through 6.

FIG. 3 is a perspective view showing a sub-rack mounted at a dishcollision preventer in FIG. 2, FIG. 4 is a plane view showing thesub-rack in FIG. 3, FIG. 5 is a side view showing the sub-rack in FIG.3, and FIG. 6 is a front view showing the sub-rack in FIG. 3.

Referring to FIGS. 3 through 6, the sub-rack 150 according to oneembodiment of the present invention may include a plurality of firstsupport members 152, and a plurality of second support members 153crossing the first support members 152.

Preferably, a crossing angle between the first support members 152 andthe second support members 153 should be a right angle (90°), but thefirst support members 152 and the second support members 153 may also becrossed to each other as long as washing water can reach enough thedishes disposed at the sub-rack 150 and the disposed dishes can beprevented from being fallen down from the sub-rack 150. That is, thefirst support members 152 and the second support members 153 may crosseach other in a rectangular shape as well as in a lozenge shape.

Here, at least one concavo-convex portion is formed at the first supportmember 152. The concavo-convex portion is formed by repeating mountainportions 152 a and valley portions 152 b, forming a wavy shape.

The first support members 152 are formed in a width direction of thesub-rack 150, and the second support members 153 are formed in alengthwise direction of the sub-rack 150. That is, since the sub-rack150 is formed to have an approximately rectangular shape, the firstsupport members 152 are disposed parallel to the short side of therectangle, and the second support members 153 are disposed parallel tothe long side of the rectangle.

Preferably, the second support members 153 are configured to cross themounting portions 152 a of the first support members 152. This isbecause the valley portions 152 b of the first support members 152 aresmall in size and do not have an enough area, thereby weakening astrength (intensity) when crossing the second support members 153.

The reason why the overall shape of the sub-rack 150 is the rectangle isthat tableware disposed at the sub-rack 150 is mainly in a long shape.Since the sub-rack 150 is mounted on the dish collision preventer 140 ofthe upper rack 100, the space between the dish collision preventer 140and the washing space 16 is not large and has a low height. Accordingly,it is difficult to dispose a rice bowl, a cup, etc., but it isappropriate to dispose long-shaped tableware such as a spoon, a fork, aknife, and the like.

Here, the sub-rack 150 is formed to have the rectangular shape due to amain frame 151 surrounding an outer periphery of the first and secondsupport members 152, 153. The main frame 151 is configured to supporteach end of the both first and second support members 152, 153, andserves as a wall for containing tableware therein. For this, it ispreferable that the main frame 151 is formed to have a height higherthan the mountain portion 152 a of the first support member 152.

Here, the valley portion 152 b of the first support member 152 isconfigured to stably accommodate the long-shaped tableware (e.g., aspoon, a fork, a knife, etc.) disposed at the sub-rack 150. Thus, byplacing the spoon or the knife at the valley portion 152 b of the firstsupport member 152, the spoon, etc. can be prevented from beingseparated from the valley portion 152 b when pushing in and/or pullingout the sub-rack 150.

For such functionality, each of the mountain portions 152 a and thevalley portions 152 b of the first support members 152 should be formedwith the same shape at the same position.

Meanwhile, a third support member 154 may be further disposed betweenthe first support members 152. The third support member 154 is formedparallel to the first support members 152, however, the third supportmember 154 is not disposed between every first support member 152.

It would be sufficient to have at least two or more third supportmembers 154 since the third support member 154 serves to accommodate thedishes which cannot be completely accommodated by the valley portion 152b of the first support member 152. It would be effective to form thethird support member 154 at each end based on the center of the sub-rack150 in consideration of a length of the dishes.

A plurality of ribs 154 a for receiving the knife or the like in anupright position are repeated at the third support members 154. Here, aheight of the ribs 154 a should be formed higher than the mountainportions 152 a of the first support member 152, but lower than the mainframe 151.

In addition, the ribs 154 a are positioned on the same straight line asthe mountain portions 152 a of the first support members 152. Spacesbetween the ribs 154 a are positioned on the same straight line as thevalley portions 152 b of the first support members 152. Accordingly, byforming the ribs 154 a and the mountain portions 152 a on the samestraight line, the tableware having the long shape (e.g., a knife, etc.)can be stably accommodated.

Here, the height of the ribs 154 a of the third support members 154 isgreater than that of the mountain portions 152 a of the first supportmembers 152, thereby requiring to support the ribs 154 a. For this, areinforcing rib 154 b is formed at each lower end of the ribs 154 a.Here, the reinforcing rib 154 b is formed at one side of the rib 154 bor at both sides thereof.

Preferably, a width W1 of the third support member 154 is greater than awidth W2 of the first support member 152. The third support member 154is configured to accommodate larger-sized dishes as well as normalsized-dishes, thus to have a width larger than the first support member152. In addition, the third support member 154 may form a mountingportion for mounting the sub-rack 150 at the dish collision preventer140. For this, it would be effective for the third support members 154to have an enough area and width.

A locking portion 155 for mounting the sub-rack 150 at the verticalsupport bars 110 forming the dish collision preventer 140 of the upperrack 100 may be formed at the sub-rack 150. The locking portion 155 isdisposed in a lengthwise direction of the main frame 151. That is, aplurality of the locking portions 155 may be formed at the long sides ofthe main frame 151, and preferably, at least two locking portions 155may be formed at each long side thereof.

Here, a locking groove 155 a capable of being locked by the verticalsupport bar 110 of the dish collision preventer 140 is formed at thelocking portion 155. In order to facilitate the mounting of the sub-rack150 and increase a coupling degree, it would be effective for thelocking groove 155 a to be opened toward a lower portion of the lockingportion 155.

As shown in FIG. 5, the locking groove 155 a is formed to have a shapeto surround an outer surface of the vertical support bars 110, andincludes a protrusion at an end thereof so as to prevent the separationof the locking groove 155 a from the vertical support bars 110.

A through-hole 155 b may be formed at an upper surface of the lockingportion 155.

In addition, a plurality of first concaved portions 156 are formed ateach short side of the main frame 151.

Here, the first concaved portions 156 are opened toward a lower portionof the sub-rack 150. As shown in FIG. 5, the first concaved portions 156are positioned on the same straight line as the spaces between thevalley portions 152 b of the first support members 152 and the ribs 154a of the third support members 154.

Although the length of the tableware (e.g., a spoon, a fork, a knife, orthe like) accommodated in the sub-rack 150 is larger than the main frame151, one end of the tableware passes the first concaved portions 156 andthen is exposed to the outside of the main frame 151, thus toaccommodate the dishes having a long length.

With the above-described construction, even though the tableware passesthe first concaved portion 156 and thereby is exposed to the outside ofthe main frame 151 since the tableware accommodated in the sub-rack 150is longer than the long side of the main frame 151, one end or both endsof the tableware may be locked by the valley portions 152 b of the firstsupport members 152 and the first concaved portions 156, thus to preventthe separation of the dishes from the sub-rack 150.

Meanwhile, a second concaved portion 157 may be formed at positions inwhich both ends of each third support member 154 are coupled to the mainframe 151.

Here, the second concaved portions 157 formed at a lower portion of thethird support members 154 serve to support the sub-rack 150, and thesecond concaved portions 157 may be formed at an entire lower portion ofthe third support members 154. In other words, if the sub-rack 150 ismounted at the lower portion of the third support members 154 by forminga groove fitted to the horizontal support bars 120 of the dish collisionpreventer 140 of the upper rack 100, the groove and the second concavedportions 157 are formed on the same straight line.

Referring to FIGS. 3 through 6, the second concaved portions 157 areformed not only at the main frame 151, but also at the lower portion ofthe third support members 154 located above the second concaved portions157.

Preferably, the sub-rack 150 is formed by injection molding, and isformed of a resin material with an anti-bacteria process so as toprevent the generation of foreign substances (e.g., mold, etc.).

Mounting the sub-rack 150 at the dish collision preventer 140 of theupper rack 100 enables the utilization of the upper space of the dishcollision preventer 140 as well as minimization of the size of thedishwasher.

The dishwasher rack having the sub-rack according to the presentinvention may be applied to the above-described compact sized dishwasheras well as compact type dishwashers having another external appearance.

The foregoing embodiments and advantages are merely exemplary and arenot to be construed as limiting the present disclosure. The presentteachings can be readily applied to other types of apparatuses. Thisdescription is intended to be illustrative, and not to limit the scopeof the claims. Many alternatives, modifications, and variations will beapparent to those skilled in the art. The features, structures, methods,and other characteristics of the exemplary embodiments described hereinmay be combined in various ways to obtain additional and/or alternativeexemplary embodiments.

As the present invention may be embodied in several forms withoutdeparting from the characteristics thereof, it should also be understoodthat the above-described embodiments are not limited by any of thedetails of the foregoing description, unless otherwise specified, butrather should be construed broadly within its scope as defined in theappended claims, and therefore all changes and modifications that fallwithin the metes and bounds of the claims, or equivalents of such metesand bounds are therefore intended to be embraced by the appended claims.

1. A dishwasher rack, comprising: a lower rack; an upper rack having adish collision preventer so as to prevent a collision with dishes placedat the lower rack; and a sub-rack mounted at the dish collisionpreventer so as to utilize a space formed above the dish collisionpreventer.
 2. The dishwasher rack of claim 1, wherein the sub-rackcomprises a plurality of first support members and a plurality of secondsupport members crossing the first support members, and at least oneconcavo-convex portion is formed at the first support members.
 3. Thedishwasher rack of claim 2, wherein the first support members aredisposed parallel to a short side of the sub-rack, and the secondsupport members are disposed parallel to a long side of the sub-rack. 4.The dishwasher rack of claim 2, wherein a main frame is formed at anouter periphery of the first and second support members.
 5. Thedishwasher rack of claim 4, wherein the sub-rack further comprises athird support member formed between the first support members.
 6. Thedishwasher rack of claim 5, wherein a plurality of ribs are formed atthe third support member.
 7. The dishwasher rack of claim 4, wherein alocking portion for mounting the sub-rack at a vertical support barforming the dish collision preventer is formed at the sub-rack, and aplurality of the locking portions are formed at the long side of themain frame.
 8. The dishwasher rack of claim 7, wherein a locking grooveis formed at the locking portion, and the locking groove is openedtoward a lower portion of the locking portion.
 9. The dishwasher rack ofclaim 8, wherein a plurality of first concaved portions are formed atthe short sides of the main frame which are perpendicular to the secondsupport members, and the first concaved portions are opened toward alower portion of the sub-rack.
 10. The dishwasher rack of claim 9,wherein concaved portions of the first concaved portions and concavedportions of the convex-concaved portion of the first support portionsare positioned on the same straight line, when viewed at the front ofthe main frame having the first concaved portions.
 11. The dishwasherrack of claim 5, wherein the main frame includes a second concavedportion at positions in which both ends of each third support member arecoupled to the main frame.
 12. The dishwasher rack of claim 5, wherein awidth of the third support member is greater than that of the firstsupport member.
 13. A compact type dishwasher, comprising: a washingspace for accommodating dishes therein; a lower rack disposed inside thewashing space; an upper rack disposed above the lower rack, and having adish collision preventer for preventing a collision with the dishesplaced at the lower rack; and a sub-rack mounted at the dish collisionpreventer so as to utilize a space formed above the dish collisionpreventer.
 14. The compact type dishwasher of claim 13, wherein thesub-rack comprises a plurality of first support members and a pluralityof second support members crossing the first support members, and atleast one concavo-convex portion is formed at the first support members.15. The compact type dishwasher of claim 14, wherein the sub-rackincludes a main frame formed at an outer periphery of the first andsecond support members.
 16. The compact type dishwasher of claim 14,wherein the sub-rack further comprises a third support member formedbetween the first support members, and a plurality of ribs are formed atthe third support member.
 17. The compact type dishwasher of claim 15,wherein a locking portion for mounting the sub-rack at a verticalsupport bar forming the dish collision preventer is formed at thesub-rack, and a plurality of the locking portions are formed at the longside of the main frame.
 18. The compact type dishwasher of claim 13,wherein a ski-shaped supporting plate is formed below the lower racksuch that the supporting plate can be prevented from being stopped by adoor for opening/closing the washing space when pushing in or pullingout the lower rack.